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Monoclinic metahewettite CaV 6 O 16 ·3H 2 O has been fabricated via thermal hydrolysis of calcium vanadate(Ca 10 V 6 O 25). High purity calcium vanadate precipitate, featuring column structure with surface area of 8.61 m2/g, can be obtained by reacting sodium orthovanadate(Na 3 VO 4) with calcium oxide at 90 ℃ for 2 h. By acidifi cation of calcium vanadate in hot water at pH of 1.0-3.0, the monoclinic metahewettite crystals with uniform particle distribution, layered structure and nonporous structure can be fabricated. With the well crystallized layered structure, CaV 6 O 16 ·3H 2 O may be a potential cathode material for secondary batteries as well as super capacitor materials.
Monoclinic metahewettite CaV 6 O 16 · 3H 2 O has been fabricated via thermal hydrolysis of calcium vanadate (Ca 10 V 6 O 25). High purity calcium vanadate precipitate, featuring column structure with surface area of 8.61 m2 / g, can be obtained by reacting sodium orthovanadate (Na 3 VO 4) with calcium oxide at 90 ℃ for 2 h. By acidifi cation of calcium vanadate in hot water at pH of 1.0-3.0, the monoclinic metahewettite crystals with uniform particle distribution, layered structure and nonporous structure can With the well crystallized layered structure, CaV 6 O 16 · 3H 2 O may be a potential cathode material for secondary batteries as well as super capacitor materials.